Tunink

iTrader: (3)

I wanna see some results vs stock LS3 heads.

It's these vs Mast Black Labels for my Holley Tunnel Ram/Solid Roller combo.

Tainted

iTrader: (9)

Ive got them for my 408 but its not even close to being together right now. They are a work of art though do a search and ive got lots of pics and info posted on them.

Tunink

iTrader: (3)

Yeah. I need some sort of results through. I really want to see specific results ie 1/8 or 1/4 times ie going from LS3 heads to the PRC heads.

Not really interested in dyno numbers even, but et and mph gained.

I'm sure they are beautiful, but I really want to push these things to the bleeding edge, and I'm not seeing the data as quickly as I would like.

Tainted

iTrader: (9)

Well I hope some people chime in but theres next to no results so dont hold your breath. I had found a few with search and several people had chimed in on my threads.

Texas speed claims 40hp over factory heads

Good luck

Tunink

iTrader: (3)

I would hope for more on a pretty serious setup.

I'm going solid roller/double fogger/tunnel ram. Looking to spin 8500ish.

Maybe the Black Labels would be a safer bet?

Tainted

iTrader: (9)

Well they claimed the 40hp on a stock ls3 car. So the gains are obviously larger the further you go.

Those mast heads though badass mother ******* is what they are. Dont forget with bronze guides you will need to use roller rockers in most cases. A good set like jesel or crower will set you back 800+

UGotBeaT

Why not go the ls7 route...for example a custom set of rhs ls7 heads?

Tainted

iTrader: (9)

Bore size. Most small bore ls7 heads are minimum 4.060 bore

UGotBeaT

Thats why i said custom. rhs offers a porters casting of the ls7 which a few people have programs for. this for a certain class?

Btw..i would look into something a little more custom since your wanting to spin 8500 with a solid roller and 2 foggers..a little more tailored to your application.

Tunink

iTrader: (3)

LS7 heads won't work on this application.

I am at a 4.030 bore currently. I have a 6.0 iron block, I've heard people of taking these things up to 4.065+ bore before, but I suspect the amount of nitrous I will be using, I will need as much meat in the cylinder walls to handle the pressure.

blackonblacksls

iTrader: (1)

If you want to spend 4k you can get RHS heads that fit 4in bore.

I'm sure you plan on that much anyways with the goals you listed.

So why not just do ls7

UGotBeaT

This for a certain Class?

Tunink

iTrader: (3)

More of a grudge car/street car. I am really trying for a certain ET more than anything else. Trying to get their on nitrous, if I can't then I'll be going turbo.

Tunink

iTrader: (3)

Don't have the bore size for LS7 heads.

If I don't go with these 260cc heads, I'll find a set of MAST LS3 heads.

UGotBeaT

What jet sizes??

An application like this and 2 foggers along with a tunnelr am and solid roller...an off the shelf set wont be enough unless you get extra work on then...exhaust throat and cross section..valve jobs etc will need to be worked on.

Tunink

iTrader: (3)

PM sent.

Jason 98 TA

iTrader: (4)

I'd be happy to put together a combo for you. I have a spring combo in mind that I think will meet your power & rpm goals. I always like LS7 heads, and even have a ls7 for 4.065" bore. That being said if your bore limited the LS3 260cc head would be a good option. The valves are relocated & the valve angles are altered as well.